diff --git a/package.json b/package.json
index 5f18d17..897b7e5 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
   "devDependencies": {
     "async": "^2.1.1",
     "chai": "^4.0.2",
-    "del": "^3.0.0",
+    "del": "^4.0.0",
     "jshint": "^2.9.3",
     "mocha": "^4.1.0",
     "qunitjs": "^2.4.0"